Adaptive equalizer for multiray model in high-speed digital land mobile radio communications

Tadashi Ogami, Hiroshi Sakaida, Fumio Takahata

    Research output: Contribution to journalArticle

    Abstract

    An effective method of signal processing related to adaptive equalization and frame synchronization is proposed, which provides good characteristics for frequency-selective fading due to multipath propagation represented by the multiray model in high-speed digital land mobile communications. This can be realized by adding two types of signal processing to the decision feedback adaptive equalizer based on dual-mode equalization combined with frame synchronization that establishes frame timing from the arriving wave with the strongest correlation with the equalization training sequence. The principle of the proposed signal processing is based on the formation of a data sequence synchronized hypothetically with the preceding and final delayed waves by means of the time shift and on the selection of the best adaptive equalization result. The bit error rate characteristics obtained by the proposed signal processing method are presented under the condition that 16 QAM is used as the modulation scheme and frequency-selective fading is characterized by the 3- through 6-ray models delayed at a symbol period interval with D/U = 0 dB, and they are quantitatively evaluated in terms of the frame timing, Eb/N0, and the amount of shift.

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    radio communication
    Radio communication
    Equalizers
    signal processing
    Signal processing
    selective fading
    high speed
    Frequency selective fading
    synchronism
    Synchronization
    time measurement
    quadrature amplitude modulation
    Multipath propagation
    shift
    Quadrature amplitude modulation
    bit error rate
    Bit error rate
    rays
    education
    communication

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    @article{1a10845a6c244080a3d19bdfcff6c192,
    title = "Adaptive equalizer for multiray model in high-speed digital land mobile radio communications",
    abstract = "An effective method of signal processing related to adaptive equalization and frame synchronization is proposed, which provides good characteristics for frequency-selective fading due to multipath propagation represented by the multiray model in high-speed digital land mobile communications. This can be realized by adding two types of signal processing to the decision feedback adaptive equalizer based on dual-mode equalization combined with frame synchronization that establishes frame timing from the arriving wave with the strongest correlation with the equalization training sequence. The principle of the proposed signal processing is based on the formation of a data sequence synchronized hypothetically with the preceding and final delayed waves by means of the time shift and on the selection of the best adaptive equalization result. The bit error rate characteristics obtained by the proposed signal processing method are presented under the condition that 16 QAM is used as the modulation scheme and frequency-selective fading is characterized by the 3- through 6-ray models delayed at a symbol period interval with D/U = 0 dB, and they are quantitatively evaluated in terms of the frame timing, Eb/N0, and the amount of shift.",
    author = "Tadashi Ogami and Hiroshi Sakaida and Fumio Takahata",
    year = "2000",
    doi = "10.1002/(SICI)1520-6432(200001)83:1<44::AID-ECJB6>3.0.CO;2-B",
    language = "English",
    volume = "83",
    pages = "44--51",
    journal = "Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)",
    issn = "8756-663X",
    publisher = "Scripta Technica",
    number = "1",

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    TY - JOUR

    T1 - Adaptive equalizer for multiray model in high-speed digital land mobile radio communications

    AU - Ogami, Tadashi

    AU - Sakaida, Hiroshi

    AU - Takahata, Fumio

    PY - 2000

    Y1 - 2000

    N2 - An effective method of signal processing related to adaptive equalization and frame synchronization is proposed, which provides good characteristics for frequency-selective fading due to multipath propagation represented by the multiray model in high-speed digital land mobile communications. This can be realized by adding two types of signal processing to the decision feedback adaptive equalizer based on dual-mode equalization combined with frame synchronization that establishes frame timing from the arriving wave with the strongest correlation with the equalization training sequence. The principle of the proposed signal processing is based on the formation of a data sequence synchronized hypothetically with the preceding and final delayed waves by means of the time shift and on the selection of the best adaptive equalization result. The bit error rate characteristics obtained by the proposed signal processing method are presented under the condition that 16 QAM is used as the modulation scheme and frequency-selective fading is characterized by the 3- through 6-ray models delayed at a symbol period interval with D/U = 0 dB, and they are quantitatively evaluated in terms of the frame timing, Eb/N0, and the amount of shift.

    AB - An effective method of signal processing related to adaptive equalization and frame synchronization is proposed, which provides good characteristics for frequency-selective fading due to multipath propagation represented by the multiray model in high-speed digital land mobile communications. This can be realized by adding two types of signal processing to the decision feedback adaptive equalizer based on dual-mode equalization combined with frame synchronization that establishes frame timing from the arriving wave with the strongest correlation with the equalization training sequence. The principle of the proposed signal processing is based on the formation of a data sequence synchronized hypothetically with the preceding and final delayed waves by means of the time shift and on the selection of the best adaptive equalization result. The bit error rate characteristics obtained by the proposed signal processing method are presented under the condition that 16 QAM is used as the modulation scheme and frequency-selective fading is characterized by the 3- through 6-ray models delayed at a symbol period interval with D/U = 0 dB, and they are quantitatively evaluated in terms of the frame timing, Eb/N0, and the amount of shift.

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